Back window air flow noise

yooper7

It was a summer night driving along in my 2010 Chevy Equinox. I didn't want the breeze on my face so I lowered a back window about 4 inches. The sound will blow your ear drums off. I thought my tire fell off. Like a helicopter landing on the roof. It actually sounds like the top of the SUV will rip off. Even if both back windows lowered 4 inches you still have the sound. Any one else have this issue?

kyfdx

yooper7 said:

It was a summer night driving along in my 2010 Chevy Equinox. I didn't want the breeze on my face so I lowered a back window about 4 inches. The sound will blow your ear drums off. I thought my tire fell off. Like a helicopter landing on the roof. It actually sounds like the top of the SUV will rip off. Even if both back windows lowered 4 inches you still have the sound. Any one else have this issue?

It's physics..

Crack the front passenger window, or the sunroof, as well.. to facilitate smoother airflow.

imidazol97

X2
It's Helmholtz resonance:
https://jalopnik.com/why-do-slightly-opened-car-windows-make-that-awful-soun-1447498738

It's similar to blowing across the top of an open pop bottle and generating a tone. This occurs at a much lower frequency.

https://www.google.com/search?rlz=1C1AOHY_enUS709US709&ei=8yDBWuuXPJi6jwSWp7XoBA&q=helmholtz+resonator+&oq=helmholtz+resonator+&gs_l=psy-ab.12..0l2.30847.30847.0.33421.1.1.0.0.0.0.112.112.0j1.1.0....0...1c.1.64.psy-ab..0.1.111....0.Kr03Pf9gfUA